... stress and roadway damage. In this paper, the active multidimensional support technology of cable truss is put forward, and its control principle is discussed, and the physical simulation experiment is done to verify the effect. After the support scheme is applied in field, the surrounding rock...

...Rock Stress and Earthquakes Xie (ed.) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-60165-8 Study on the coupling system of high prestress cable truss and surrounding rock on a coal roadway Fulian He, Dongping Ying & Hong Yan China University of Mining and Technology (Beijing), Beijing...

... formulas of stress field is deduced, so that the correctness of the process and the superiority of the boundary element back-analysis method are verified, taking the calculation of a coal mine roadway an instance. 1 INSTRUCTION Earthquake is the swift vibration of the crust in a short time and one...

... of resources and Environment, Hebei Polytechnic University, Tangshan, Hebei, China ABSTRACT: As the depth increasing of domestic and foreign coal mines, the ground press increasing gradually and the mining conditions are getting worse and worse. By the impact of tunneling and mining face, the roadway...

... ABSTRACT: Floor heave is one of the most difficult problems of soft rock roadway supporting in coal mines. A serious floor heave have occurred when the west wing track roadway of Tingnan coal mine was being constructed, the maximum value reached to 50 cm, which impacted the normal application...

.... 4.1 Initial caving of 52 m sublevel As shown in Figure 1, on the south wall of +579B2 roadway, a pair of shot holes were bored every 25 m along the trend direction of coal seam, those holes diameter is 800 mm, the height is 20 m, and the dis- tance between each pair holes is 6 m. To each pair holes...

... ABSTRACT: The haulage roadway of the fifth coal mine of Hebi coal group located in the syncline axis, depth of burial 706 m, is suffering from a knotty problem of severe tunnel deformation and in short supply of production due to high tectonic stress and complex geological environment...

... qiao in-situ stress measurement application China CAI Reservoir Characterization Upstream Oil & Gas borehole strain value roadway situ stress measurement result Rock Stress and Earthquakes Xie (ed.) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-60165-8 New development...